llvm::ARMBaseRegisterInfo Class Reference

#include "Target/ARM/ARMBaseRegisterInfo.h"

Inheritance diagram for llvm::ARMBaseRegisterInfo:

Collaboration diagram for llvm::ARMBaseRegisterInfo:

Public Member Functions
const MCPhysReg *	getCalleeSavedRegs (const MachineFunction *MF) const override
	Code Generation virtual methods... More...
const MCPhysReg *	getCalleeSavedRegsViaCopy (const MachineFunction *MF) const
const uint32_t *	getCallPreservedMask (const MachineFunction &MF, CallingConv::ID) const override
const uint32_t *	getNoPreservedMask () const override
const uint32_t *	getTLSCallPreservedMask (const MachineFunction &MF) const
const uint32_t *	getSjLjDispatchPreservedMask (const MachineFunction &MF) const
const uint32_t *	getThisReturnPreservedMask (const MachineFunction &MF, CallingConv::ID) const
	getThisReturnPreservedMask - Returns a call preserved mask specific to the case that 'returned' is on an i32 first argument if the calling convention is one that can (partially) model this attribute with a preserved mask (i.e. More...
ArrayRef< MCPhysReg >	getIntraCallClobberedRegs (const MachineFunction *MF) const override
BitVector	getReservedRegs (const MachineFunction &MF) const override
bool	isAsmClobberable (const MachineFunction &MF, MCRegister PhysReg) const override
bool	isInlineAsmReadOnlyReg (const MachineFunction &MF, unsigned PhysReg) const override
const TargetRegisterClass *	getPointerRegClass (const MachineFunction &MF, unsigned Kind=0) const override
const TargetRegisterClass *	getCrossCopyRegClass (const TargetRegisterClass *RC) const override
const TargetRegisterClass *	getLargestLegalSuperClass (const TargetRegisterClass *RC, const MachineFunction &MF) const override
unsigned	getRegPressureLimit (const TargetRegisterClass *RC, MachineFunction &MF) const override
bool	getRegAllocationHints (Register VirtReg, ArrayRef< MCPhysReg > Order, SmallVectorImpl< MCPhysReg > &Hints, const MachineFunction &MF, const VirtRegMap *VRM, const LiveRegMatrix *Matrix) const override
void	updateRegAllocHint (Register Reg, Register NewReg, MachineFunction &MF) const override
bool	hasBasePointer (const MachineFunction &MF) const
bool	canRealignStack (const MachineFunction &MF) const override
int64_t	getFrameIndexInstrOffset (const MachineInstr *MI, int Idx) const override
bool	needsFrameBaseReg (MachineInstr *MI, int64_t Offset) const override
	needsFrameBaseReg - Returns true if the instruction's frame index reference would be better served by a base register other than FP or SP. More...
Register	materializeFrameBaseRegister (MachineBasicBlock *MBB, int FrameIdx, int64_t Offset) const override
	materializeFrameBaseRegister - Insert defining instruction(s) for BaseReg to be a pointer to FrameIdx at the beginning of the basic block. More...
void	resolveFrameIndex (MachineInstr &MI, Register BaseReg, int64_t Offset) const override
bool	isFrameOffsetLegal (const MachineInstr *MI, Register BaseReg, int64_t Offset) const override
bool	cannotEliminateFrame (const MachineFunction &MF) const
Register	getFrameRegister (const MachineFunction &MF) const override
Register	getBaseRegister () const
virtual void	emitLoadConstPool (MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, const DebugLoc &dl, Register DestReg, unsigned SubIdx, int Val, ARMCC::CondCodes Pred=ARMCC::AL, Register PredReg=Register(), unsigned MIFlags=MachineInstr::NoFlags) const
	emitLoadConstPool - Emits a load from constpool to materialize the specified immediate. More...
bool	requiresRegisterScavenging (const MachineFunction &MF) const override
	Code Generation virtual methods... More...
bool	requiresFrameIndexScavenging (const MachineFunction &MF) const override
bool	requiresVirtualBaseRegisters (const MachineFunction &MF) const override
bool	eliminateFrameIndex (MachineBasicBlock::iterator II, int SPAdj, unsigned FIOperandNum, RegScavenger *RS=nullptr) const override
bool	shouldCoalesce (MachineInstr *MI, const TargetRegisterClass *SrcRC, unsigned SubReg, const TargetRegisterClass *DstRC, unsigned DstSubReg, const TargetRegisterClass *NewRC, LiveIntervals &LIS) const override
	SrcRC and DstRC will be morphed into NewRC if this returns true. More...
bool	shouldRewriteCopySrc (const TargetRegisterClass *DefRC, unsigned DefSubReg, const TargetRegisterClass *SrcRC, unsigned SrcSubReg) const override
int	getSEHRegNum (unsigned i) const

Protected Member Functions
	ARMBaseRegisterInfo ()
unsigned	getOpcode (int Op) const

Protected Attributes
unsigned	BasePtr = ARM::R6
	BasePtr - ARM physical register used as a base ptr in complex stack frames. More...

Detailed Description

Definition at line 127 of file ARMBaseRegisterInfo.h.

Constructor & Destructor Documentation

ARMBaseRegisterInfo()

ARMBaseRegisterInfo::ARMBaseRegisterInfo ( )

explicitprotected

Definition at line 57 of file ARMBaseRegisterInfo.cpp.

References llvm::ARM_MC::initLLVMToCVRegMapping().

Member Function Documentation

cannotEliminateFrame()

bool ARMBaseRegisterInfo::cannotEliminateFrame

(

const MachineFunction &

MF

)

const

Definition at line 476 of file ARMBaseRegisterInfo.cpp.

References llvm::MachineFrameInfo::adjustsStack(), llvm::TargetOptions::DisableFramePointerElim(), llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getTarget(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::MachineFrameInfo::isFrameAddressTaken(), and llvm::TargetMachine::Options.

Referenced by llvm::ARMFrameLowering::determineCalleeSaves().

canRealignStack()

bool ARMBaseRegisterInfo::canRealignStack ( const MachineFunction &  MF ) const

override

Definition at line 453 of file ARMBaseRegisterInfo.cpp.

References BasePtr, llvm::TargetRegisterInfo::canRealignStack(), llvm::MachineRegisterInfo::canReserveReg(), llvm::ARMSubtarget::getFramePointerReg(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::ARMFrameLowering::hasReservedCallFrame(), and MRI.

Referenced by checkNumAlignedDPRCS2Regs(), and needsFrameBaseReg().

eliminateFrameIndex()

bool ARMBaseRegisterInfo::eliminateFrameIndex ( MachineBasicBlock::iterator  II, int  SPAdj, unsigned  FIOperandNum, RegScavenger *  RS = nullptr  ) const

override

Definition at line 790 of file ARMBaseRegisterInfo.cpp.

References llvm::ARMII::AddrMode4, llvm::ARMII::AddrMode6, llvm::ARMII::AddrModeMask, llvm::ARMII::AddrModeT2_i7, llvm::ARMII::AddrModeT2_i7s2, llvm::ARMII::AddrModeT2_i7s4, llvm::ARMCC::AL, assert(), llvm::TargetRegisterClass::contains(), llvm::MachineRegisterInfo::createVirtualRegister(), llvm::emitARMRegPlusImmediate(), llvm::emitT2RegPlusImmediate(), llvm::ISD::FrameIndex, llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::ARMFrameLowering::hasReservedCallFrame(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::RegScavenger::isScavengingFrameIndex(), llvm::ARMFunctionInfo::isThumb1OnlyFunction(), llvm::ARMFunctionInfo::isThumb2Function(), llvm::ARMFunctionInfo::isThumbFunction(), llvm::Register::isVirtualRegister(), MBB, MI, llvm::ARMFrameLowering::ResolveFrameIndexReference(), llvm::rewriteARMFrameIndex(), llvm::rewriteT2FrameIndex(), and TII.

Referenced by llvm::ThumbRegisterInfo::eliminateFrameIndex().

emitLoadConstPool()

void ARMBaseRegisterInfo::emitLoadConstPool ( MachineBasicBlock &  MBB, MachineBasicBlock::iterator &  MBBI, const DebugLoc &  dl, Register  DestReg, unsigned  SubIdx, int  Val, ARMCC::CondCodes  Pred = ARMCC::AL, Register  PredReg = Register(), unsigned  MIFlags = MachineInstr::NoFlags  ) const

virtual

emitLoadConstPool - Emits a load from constpool to materialize the specified immediate.

Reimplemented in llvm::ThumbRegisterInfo.

Definition at line 496 of file ARMBaseRegisterInfo.cpp.

References llvm::MachineInstrBuilder::add(), llvm::MachineInstrBuilder::addConstantPoolIndex(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), Align, llvm::BuildMI(), llvm::ConstantInt::get(), llvm::MachineFunction::getConstantPool(), llvm::Function::getContext(), llvm::getDefRegState(), llvm::MachineFunction::getFunction(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::Type::getInt32Ty(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getSubtarget(), MBB, MBBI, llvm::predOps(), llvm::MachineInstrBuilder::setMIFlags(), and TII.

Referenced by llvm::ARMFrameLowering::adjustForSegmentedStacks().

getBaseRegister()

Register llvm::ARMBaseRegisterInfo::getBaseRegister ( ) const

inline

Definition at line 209 of file ARMBaseRegisterInfo.h.

References BasePtr.

Referenced by llvm::ARMFrameLowering::determineCalleeSaves(), llvm::Thumb1FrameLowering::emitPrologue(), and llvm::ARMFrameLowering::ResolveFrameIndexReference().

getCalleeSavedRegs()

const MCPhysReg * ARMBaseRegisterInfo::getCalleeSavedRegs ( const MachineFunction *  MF ) const

override

Code Generation virtual methods...

Definition at line 63 of file ARMBaseRegisterInfo.cpp.

References llvm::CallingConv::CFGuard_Check, llvm::CallingConv::CXX_FAST_TLS, F, llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), llvm::MachineFunction::getSubtarget(), llvm::ARMSubtarget::getTargetLowering(), llvm::CallingConv::GHC, llvm::ARMSubtarget::isMClass(), llvm::ARMFunctionInfo::isSplitCSR(), llvm::ARMSubtarget::isTargetDarwin(), llvm::ARMSubtarget::splitFramePointerPush(), llvm::ARMSubtarget::splitFramePushPop(), llvm::ARMTargetLowering::supportSwiftError(), and llvm::CallingConv::SwiftTail.

Referenced by llvm::ARMFrameLowering::determineCalleeSaves().

getCalleeSavedRegsViaCopy()

const MCPhysReg * ARMBaseRegisterInfo::getCalleeSavedRegsViaCopy

(

const MachineFunction *

MF

)

const

Definition at line 121 of file ARMBaseRegisterInfo.cpp.

References assert(), llvm::CallingConv::CXX_FAST_TLS, llvm::Function::getCallingConv(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getInfo(), and llvm::ARMFunctionInfo::isSplitCSR().

getCallPreservedMask()

const uint32_t * ARMBaseRegisterInfo::getCallPreservedMask ( const MachineFunction &  MF, CallingConv::ID  CC  ) const

override

Definition at line 131 of file ARMBaseRegisterInfo.cpp.

References CC, llvm::CallingConv::CFGuard_Check, llvm::CallingConv::CXX_FAST_TLS, llvm::Function::getAttributes(), llvm::MachineFunction::getFunction(), llvm::MachineFunction::getSubtarget(), llvm::ARMSubtarget::getTargetLowering(), llvm::CallingConv::GHC, llvm::AttributeList::hasAttrSomewhere(), llvm::ARMSubtarget::isTargetDarwin(), llvm::ARMTargetLowering::supportSwiftError(), and llvm::CallingConv::SwiftTail.

getCrossCopyRegClass()

const TargetRegisterClass * ARMBaseRegisterInfo::getCrossCopyRegClass ( const TargetRegisterClass *  RC ) const

override

Definition at line 292 of file ARMBaseRegisterInfo.cpp.

getFrameIndexInstrOffset()

int64_t ARMBaseRegisterInfo::getFrameIndexInstrOffset ( const MachineInstr *  MI, int  Idx  ) const

override

Definition at line 531 of file ARMBaseRegisterInfo.cpp.

References llvm::ARMII::AddrMode2, llvm::ARMII::AddrMode3, llvm::ARMII::AddrMode5, llvm::ARMII::AddrMode_i12, llvm::ARMII::AddrModeMask, llvm::ARMII::AddrModeT1_s, llvm::ARMII::AddrModeT2_i12, llvm::ARMII::AddrModeT2_i8, llvm::ARMII::AddrModeT2_i8neg, llvm::ARMII::AddrModeT2_i8pos, llvm::ARM_AM::getAM2Offset(), llvm::ARM_AM::getAM2Op(), llvm::ARM_AM::getAM3Offset(), llvm::ARM_AM::getAM3Op(), llvm::ARM_AM::getAM5Offset(), llvm::ARM_AM::getAM5Op(), llvm::MachineOperand::getImm(), llvm_unreachable, MI, llvm::ARM_AM::sub, and llvm::MCInstrDesc::TSFlags.

Referenced by isFrameOffsetLegal().

getFrameRegister()

Register ARMBaseRegisterInfo::getFrameRegister ( const MachineFunction &  MF ) const

override

Definition at line 485 of file ARMBaseRegisterInfo.cpp.

References llvm::ARMSubtarget::getFramePointerReg(), and llvm::MachineFunction::getSubtarget().

Referenced by llvm::ARMFrameLowering::determineCalleeSaves(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::ARMFrameLowering::emitPrologue(), needsFrameBaseReg(), llvm::ARMFrameLowering::ResolveFrameIndexReference(), llvm::Thumb1FrameLowering::restoreCalleeSavedRegisters(), and llvm::Thumb1FrameLowering::spillCalleeSavedRegisters().

getIntraCallClobberedRegs()

ArrayRef< MCPhysReg > ARMBaseRegisterInfo::getIntraCallClobberedRegs ( const MachineFunction *  MF ) const

override

Definition at line 193 of file ARMBaseRegisterInfo.cpp.

getLargestLegalSuperClass()

const TargetRegisterClass * ARMBaseRegisterInfo::getLargestLegalSuperClass ( const TargetRegisterClass *  RC, const MachineFunction &  MF  ) const

override

Definition at line 256 of file ARMBaseRegisterInfo.cpp.

References llvm::TargetRegisterClass::getID(), llvm::MachineFunction::getSubtarget(), llvm::TargetRegisterClass::getSuperClasses(), and I.

Referenced by llvm::ThumbRegisterInfo::getLargestLegalSuperClass().

getNoPreservedMask()

const uint32_t * ARMBaseRegisterInfo::getNoPreservedMask ( ) const

override

Definition at line 154 of file ARMBaseRegisterInfo.cpp.

getOpcode()

unsigned llvm::ARMBaseRegisterInfo::getOpcode ( int  Op ) const

protected

getPointerRegClass()

const TargetRegisterClass * ARMBaseRegisterInfo::getPointerRegClass ( const MachineFunction &  MF, unsigned  Kind = 0  ) const

override

Definition at line 286 of file ARMBaseRegisterInfo.cpp.

Referenced by llvm::ThumbRegisterInfo::getPointerRegClass().

getRegAllocationHints()

bool ARMBaseRegisterInfo::getRegAllocationHints ( Register  VirtReg, ArrayRef< MCPhysReg >  Order, SmallVectorImpl< MCPhysReg > &  Hints, const MachineFunction &  MF, const VirtRegMap *  VRM, const LiveRegMatrix *  Matrix  ) const

override

Definition at line 336 of file ARMBaseRegisterInfo.cpp.

References llvm::TargetRegisterClass::contains(), getPairedGPR(), llvm::VirtRegMap::getPhys(), llvm::MachineRegisterInfo::getRegAllocationHint(), llvm::TargetRegisterInfo::getRegAllocationHints(), llvm::MachineRegisterInfo::getRegClass(), llvm::MachineFunction::getRegInfo(), llvm::VirtRegMap::hasPhys(), llvm::is_contained(), llvm::Register::isPhysical(), llvm::MachineRegisterInfo::isReserved(), MRI, llvm::ARMRI::RegLR, llvm::ARMRI::RegPairEven, and llvm::ARMRI::RegPairOdd.

getRegPressureLimit()

unsigned ARMBaseRegisterInfo::getRegPressureLimit ( const TargetRegisterClass *  RC, MachineFunction &  MF  ) const

override

Definition at line 299 of file ARMBaseRegisterInfo.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::TargetRegisterClass::getID(), llvm::MachineFunction::getSubtarget(), llvm::MachineFrameInfo::isMaxCallFrameSizeComputed(), and llvm::ARMSubtarget::isR9Reserved().

getReservedRegs()

BitVector ARMBaseRegisterInfo::getReservedRegs ( const MachineFunction &  MF ) const

override

Definition at line 200 of file ARMBaseRegisterInfo.cpp.

References assert(), BasePtr, llvm::ARMSubtarget::getFramePointerReg(), llvm::MachineFunction::getSubtarget(), hasBasePointer(), llvm::ARMSubtarget::isR9Reserved(), llvm::Reserved, and SI.

Referenced by isAsmClobberable().

getSEHRegNum()

int llvm::ARMBaseRegisterInfo::getSEHRegNum ( unsigned  i ) const

inline

Definition at line 245 of file ARMBaseRegisterInfo.h.

References i.

getSjLjDispatchPreservedMask()

const uint32_t * ARMBaseRegisterInfo::getSjLjDispatchPreservedMask

(

const MachineFunction &

MF

)

const

Definition at line 166 of file ARMBaseRegisterInfo.cpp.

References llvm::MachineFunction::getSubtarget(), llvm::ARMSubtarget::hasVFP2Base(), and llvm::ARMSubtarget::isThumb1Only().

getThisReturnPreservedMask()

const uint32_t * ARMBaseRegisterInfo::getThisReturnPreservedMask	(	const MachineFunction &	MF,
		CallingConv::ID	CC
	)		const

getThisReturnPreservedMask - Returns a call preserved mask specific to the case that 'returned' is on an i32 first argument if the calling convention is one that can (partially) model this attribute with a preserved mask (i.e.

it is a calling convention that uses the same register for the first i32 argument and an i32 return value)

Should return NULL in the case that the calling convention does not have this property

Definition at line 175 of file ARMBaseRegisterInfo.cpp.

References CC, llvm::MachineFunction::getSubtarget(), llvm::CallingConv::GHC, and llvm::ARMSubtarget::isTargetDarwin().

getTLSCallPreservedMask()

const uint32_t * ARMBaseRegisterInfo::getTLSCallPreservedMask

(

const MachineFunction &

MF

)

const

Definition at line 159 of file ARMBaseRegisterInfo.cpp.

References assert(), llvm::MachineFunction::getSubtarget(), and llvm::ARMSubtarget::isTargetDarwin().

hasBasePointer()

bool ARMBaseRegisterInfo::hasBasePointer

(

const MachineFunction &

MF

)

const

Definition at line 416 of file ARMBaseRegisterInfo.cpp.

References llvm::MachineFunction::getFrameInfo(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getLocalFrameSize(), llvm::MachineFrameInfo::hasVarSizedObjects(), llvm::ARMFunctionInfo::isThumb1OnlyFunction(), and llvm::ARMFunctionInfo::isThumb2Function().

Referenced by llvm::ARMFrameLowering::determineCalleeSaves(), llvm::Thumb1FrameLowering::emitPrologue(), getReservedRegs(), isInlineAsmReadOnlyReg(), and llvm::ARMFrameLowering::ResolveFrameIndexReference().

isAsmClobberable()

bool ARMBaseRegisterInfo::isAsmClobberable ( const MachineFunction &  MF, MCRegister  PhysReg  ) const

override

Definition at line 236 of file ARMBaseRegisterInfo.cpp.

References getReservedRegs(), and llvm::BitVector::test().

isFrameOffsetLegal()

bool ARMBaseRegisterInfo::isFrameOffsetLegal ( const MachineInstr *  MI, Register  BaseReg, int64_t  Offset  ) const

override

Definition at line 721 of file ARMBaseRegisterInfo.cpp.

References llvm::ARMII::AddrMode2, llvm::ARMII::AddrMode3, llvm::ARMII::AddrMode4, llvm::ARMII::AddrMode5, llvm::ARMII::AddrMode6, llvm::ARMII::AddrMode_i12, llvm::ARMII::AddrModeMask, llvm::ARMII::AddrModeT1_s, llvm::ARMII::AddrModeT2_i12, llvm::ARMII::AddrModeT2_i8, llvm::ARMII::AddrModeT2_i8neg, llvm::ARMII::AddrModeT2_i8pos, assert(), getFrameIndexInstrOffset(), i, isSigned(), llvm_unreachable, llvm::BitmaskEnumDetail::Mask(), MI, and llvm::MCInstrDesc::TSFlags.

Referenced by needsFrameBaseReg().

isInlineAsmReadOnlyReg()

bool ARMBaseRegisterInfo::isInlineAsmReadOnlyReg ( const MachineFunction &  MF, unsigned  PhysReg  ) const

override

Definition at line 240 of file ARMBaseRegisterInfo.cpp.

References assert(), BasePtr, llvm::ARMSubtarget::getFramePointerReg(), llvm::MachineFunction::getSubtarget(), hasBasePointer(), and llvm::Reserved.

materializeFrameBaseRegister()

Register ARMBaseRegisterInfo::materializeFrameBaseRegister ( MachineBasicBlock *  MBB, int  FrameIdx, int64_t  Offset  ) const

override

materializeFrameBaseRegister - Insert defining instruction(s) for BaseReg to be a pointer to FrameIdx at the beginning of the basic block.

Definition at line 665 of file ARMBaseRegisterInfo.cpp.

References llvm::MachineInstrBuilder::add(), llvm::MachineInstrBuilder::addFrameIndex(), llvm::MachineInstrBuilder::addImm(), llvm::ARMCC::AL, llvm::MachineBasicBlock::begin(), llvm::BuildMI(), llvm::condCodeOp(), llvm::MachineRegisterInfo::constrainRegClass(), llvm::MachineRegisterInfo::createVirtualRegister(), DL, llvm::MachineBasicBlock::end(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::MipsISD::Ins, llvm::ARMFunctionInfo::isThumb1OnlyFunction(), llvm::ARMFunctionInfo::isThumbFunction(), MBB, MRI, llvm::predOps(), and TII.

needsFrameBaseReg()

bool ARMBaseRegisterInfo::needsFrameBaseReg ( MachineInstr *  MI, int64_t  Offset  ) const

override

needsFrameBaseReg - Returns true if the instruction's frame index reference would be better served by a base register other than FP or SP.

Used by LocalStackFrameAllocation to determine which frame index references it should create new base registers for.

Definition at line 584 of file ARMBaseRegisterInfo.cpp.

References assert(), canRealignStack(), llvm::MachineFunction::getFrameInfo(), getFrameRegister(), llvm::MachineFunction::getInfo(), llvm::MachineFrameInfo::getLocalFrameMaxAlign(), llvm::MachineFrameInfo::getLocalFrameSize(), llvm::TargetFrameLowering::getStackAlign(), llvm::ARMFrameLowering::hasFP(), llvm::MachineFrameInfo::hasVarSizedObjects(), i, isFrameOffsetLegal(), llvm::ARMFunctionInfo::isThumb1OnlyFunction(), llvm::ARMFunctionInfo::isThumbFunction(), and MI.

requiresFrameIndexScavenging()

bool ARMBaseRegisterInfo::requiresFrameIndexScavenging ( const MachineFunction &  MF ) const

override

Definition at line 521 of file ARMBaseRegisterInfo.cpp.

requiresRegisterScavenging()

bool ARMBaseRegisterInfo::requiresRegisterScavenging ( const MachineFunction &  MF ) const

override

Code Generation virtual methods...

Definition at line 516 of file ARMBaseRegisterInfo.cpp.

requiresVirtualBaseRegisters()

bool ARMBaseRegisterInfo::requiresVirtualBaseRegisters ( const MachineFunction &  MF ) const

override

Definition at line 526 of file ARMBaseRegisterInfo.cpp.

resolveFrameIndex()

void ARMBaseRegisterInfo::resolveFrameIndex ( MachineInstr &  MI, Register  BaseReg, int64_t  Offset  ) const

override

Definition at line 693 of file ARMBaseRegisterInfo.cpp.

References assert(), llvm::MachineFunction::getInfo(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getSubtarget(), i, llvm::ARMFunctionInfo::isThumb1OnlyFunction(), llvm::ARMFunctionInfo::isThumb2Function(), llvm::ARMFunctionInfo::isThumbFunction(), MBB, MI, llvm::rewriteARMFrameIndex(), llvm::rewriteT2FrameIndex(), and TII.

Referenced by llvm::ThumbRegisterInfo::resolveFrameIndex().

shouldCoalesce()

bool ARMBaseRegisterInfo::shouldCoalesce ( MachineInstr *  MI, const TargetRegisterClass *  SrcRC, unsigned  SubReg, const TargetRegisterClass *  DstRC, unsigned  DstSubReg, const TargetRegisterClass *  NewRC, LiveIntervals &  LIS  ) const

override

SrcRC and DstRC will be morphed into NewRC if this returns true.

Definition at line 878 of file ARMBaseRegisterInfo.cpp.

References llvm::dbgs(), llvm::ARMFunctionInfo::getCoalescedWeight(), llvm::MachineBasicBlock::getParent(), llvm::TargetRegisterInfo::getRegClassWeight(), llvm::MachineRegisterInfo::getTargetRegisterInfo(), LLVM_DEBUG, MBB, MI, MRI, and llvm::MachineBasicBlock::size().

shouldRewriteCopySrc()

bool ARMBaseRegisterInfo::shouldRewriteCopySrc ( const TargetRegisterClass *  DefRC, unsigned  DefSubReg, const TargetRegisterClass *  SrcRC, unsigned  SrcSubReg  ) const

override

Definition at line 937 of file ARMBaseRegisterInfo.cpp.

References llvm::TargetRegisterInfo::shouldRewriteCopySrc().

updateRegAllocHint()

void ARMBaseRegisterInfo::updateRegAllocHint ( Register  Reg, Register  NewReg, MachineFunction &  MF  ) const

override

Definition at line 391 of file ARMBaseRegisterInfo.cpp.

References llvm::MachineRegisterInfo::getRegAllocationHint(), llvm::MachineFunction::getRegInfo(), llvm::Register::isVirtualRegister(), MRI, llvm::ARMRI::RegPairEven, llvm::ARMRI::RegPairOdd, and llvm::MachineRegisterInfo::setRegAllocationHint().

Member Data Documentation

BasePtr

unsigned llvm::ARMBaseRegisterInfo::BasePtr = ARM::R6

protected

BasePtr - ARM physical register used as a base ptr in complex stack frames.

I.e., when we need a 3rd base, not just SP and FP, due to variable size stack objects.

Definition at line 132 of file ARMBaseRegisterInfo.h.

Referenced by canRealignStack(), getBaseRegister(), getReservedRegs(), and isInlineAsmReadOnlyReg().

---

The documentation for this class was generated from the following files:

• lib/Target/ARM/ARMBaseRegisterInfo.h
• lib/Target/ARM/ARMBaseRegisterInfo.cpp